William Shatner — actor, comedian, pitchman, recording artist and author — turns 80 today. From Captain Kirk to an interpretive performance of "Common People," Shatner has had an accomplished and eccentric life. TIME takes a look at some of his best moments

‘Khaaaan!’

In Star Trek II: The Wrath of Khan, Captain Kirk’s nemesis (one of the greatest movie villains of all time) comes to take revenge against Kirk for having left him for dead in exile on a barren planet. Popular to this day, even by those who have never seen any other Star Trek episodes or films, Shatner’s pitch-perfect exclamation of rage has found its way onto T-shirts, been made into an online loop animation, received Facebook fans and come to represent pissed-off people everywhere (even babies).